OKI OL610E Manuale Utente
%2.3 Power Supply Board
2.3 Power Supply Board
The power supply board consists of an AC filter circuit, a low voltage power supply circuit, a high voltage
power supply circuit, heater drive circuit, and photosensors.
(1) Low Voltage Power Supply Circuit
This circuit generates the following voltages.
Output voltage
Use
+5 V
Logic circuit supply voltage
+30 V
Motor and fan drive voltage and source
voltage for high-voltage supply
voltage for high-voltage supply
+8 V
Analog supply voltage
-8 V
PS board and analog circuit supply voltage
(2) High Voltage Power Supply Circuit
This circuit generates following voltages required for electrophotographic process from +5 V, according to
the control sequence from the control board. When cover open state is detected, +5 V supply is
interrupted automatically to stop the supply of all high-voltage outputs.
This circuit generates following voltages required for electrophotographic process from +5 V, according to
the control sequence from the control board. When cover open state is detected, +5 V supply is
interrupted automatically to stop the supply of all high-voltage outputs.
Output
Voltage
Use
Remarks
CH
-1.35 KV
Voltage applied to charging
roller
roller
DB
-300 V/+300 V
Voltage applied to developing
roller
roller
SB
-450 V/ 0 V
Voltage applied to toner supply
roller
roller
TR
+500 V to +4 KV/-750 V
Voltage applied to transfer roller
Variable
CB
+400 V
Voltage applied to cleaning
roller
roller
(3) Photosensor
The photosensor mounted on this power supply board monitors the paper running state during printing.
The sensor layout diagram is shown in Figure 2-3.
The photosensor mounted on this power supply board monitors the paper running state during printing.
The sensor layout diagram is shown in Figure 2-3.
OKI OL600/610ex (96-01-18